Re: [Mono-list] Instantiating an object via AppDomain.CreateInstance
Anyway, it is now fixed in CVS.
On dj, 2004-06-17 at 18:49, Lluis Sanchez wrote:
> Looks like a bug. Can you please file a bug report in
> bugzilla.ximian.com?
>
> Thanks!
> Lluis.
>
> On dj, 2004-06-17 at 17:55, Yuri Leikind wrote:
> > Hello all,
> >
> >
> > If I instantiate an object via AppDomain.CreateInstance , and this object's
> > class has a constructor with parameters, I get the exception
> >
> > Unhandled Exception: System.MissingMethodException: Constructor not found.
> >
> > though needed parameters are passed to AppDomain.CreateInstance
> >
> > I found it out trying an example from Programming C#, 2nd edition. This example
> > runs on MS .NET and fails on Mono.
> >
> > Here is it :
> >
> >
> > using System;
> > using System.Runtime.Remoting;
> > using System.Reflection;
> > namespace ProgCSharp
> > {
> >// for marshal by reference comment out
> >// the attribute and uncomment the base class
> >[Serializable]
> >public class Point // : MarshalByRefObject
> >{
> > public Point (int x, int y)
> > {
> > Console.WriteLine( "[{0}] {1}",
> > System.AppDomain.CurrentDomain.FriendlyName,
> > "Point constructor");
> > this.x = x;
> > this.y = y;
> > }
> > public int X
> > {
> > get
> > {
> > Console.WriteLine( "[{0}] {1}",
> >System.AppDomain.CurrentDomain.FriendlyName,
> >"Point x.get");
> > return this.x;
> > }
> > set
> > {
> > Console.WriteLine( "[{0}] {1}",
> >System.AppDomain.CurrentDomain.FriendlyName,
> >"Point x.set");
> > this.x = value;
> > }
> > }
> > public int Y
> > {
> > get
> > {
> > Console.WriteLine( "[{0}] {1}",
> >System.AppDomain.CurrentDomain.FriendlyName,
> >"Point y.get");
> > return this.y;
> > }
> > set
> > {
> > Console.WriteLine( "[{0}] {1}",
> >System.AppDomain.CurrentDomain.FriendlyName,
> >"Point y.set");
> > this.y = value;
> > }
> > }
> >
> >
> >private int x;
> >private int y;
> > }
> > // the shape class marshals by reference
> > public class Shape : MarshalByRefObject
> > {
> >public Shape(int upperLeftX, int upperLeftY)
> >{
> > Console.WriteLine( "[{0}] {1}",
> > System.AppDomain.CurrentDomain.FriendlyName,
> > "Shape constructor");
> > upperLeft = new Point(upperLeftX, upperLeftY);
> >}
> >public Point GetUpperLeft( )
> >{
> > return upperLeft;
> >}
> >public void ShowUpperLeft( )
> >{
> > Console.WriteLine( "[{0}] Upper left: {1},{2}",
> > System.AppDomain.CurrentDomain.FriendlyName,
> > upperLeft.X, upperLeft.Y);
> >}
> >private Point upperLeft;
> > }
> > public class Tester
> > {
> >public static void Main( )
> >{
> > Console.WriteLine( "[{0}] {1}",
> > System.AppDomain.CurrentDomain.FriendlyName,
> > "Entered Main");
> > // create the new app domain
> > AppDomain ad2 =
> > AppDomain.CreateDomain("Shape Domain");
> > // Assembly a = Assembly.LoadFrom("ProgCSharp.exe");
> > // Object theShape = a.CreateInstance("Shape");
> > // instantiate a Shape object
> > ObjectHandle oh = ad2.CreateInstance(
> > "ProgCSharp",
> > "ProgCSharp.Shape", false,
> > System.Reflection.BindingFlags.CreateInstance,
> > null, new object[] {3, 5},
> > null, null, null );
> > Shape s1 = (Shape) oh.Unwrap( );
> > s1.ShowUpperLeft( ); // ask the object to display
> > // get a local copy? proxy?
> > Point localPoint = s1.GetUpperLeft( );
> > // assign new values
> > localPoint.X = 500;
> > localPoint.Y = 600;
> > // display the value of the local Point object
> > Console.WriteLine( "[{0}] localPoint: {1}, {2}",
> >System.AppDomain.CurrentDomain.FriendlyName,
> >localPoint.X, localPoint.Y);
> > s1.ShowUpperLeft( ); // show the value once more
> > }
> >}
> > }
> >
> >
> >
> > Here is the output:
> >
> > [EMAIL PROTECTED]:~$ mono ProgCSharp.exe
> > [ProgCSharp.exe] Entered Main
> >
> > Unhandled Exception: System.MissingMethodException: Constructor not found.
> >
> > Server stack trace:
> > in <0x0019a> System.Activator:CreateInstance
> > (System.Type,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo,object[])
> > in <0x00074> System.Activator:CreateInstance
> > (string,string,bool,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalizati
Re: [Mono-list] Instantiating an object via AppDomain.CreateInstance
Looks like a bug. Can you please file a bug report in
bugzilla.ximian.com?
Thanks!
Lluis.
On dj, 2004-06-17 at 17:55, Yuri Leikind wrote:
> Hello all,
>
>
> If I instantiate an object via AppDomain.CreateInstance , and this object's
> class has a constructor with parameters, I get the exception
>
> Unhandled Exception: System.MissingMethodException: Constructor not found.
>
> though needed parameters are passed to AppDomain.CreateInstance
>
> I found it out trying an example from Programming C#, 2nd edition. This example
> runs on MS .NET and fails on Mono.
>
> Here is it :
>
>
> using System;
> using System.Runtime.Remoting;
> using System.Reflection;
> namespace ProgCSharp
> {
>// for marshal by reference comment out
>// the attribute and uncomment the base class
>[Serializable]
>public class Point // : MarshalByRefObject
>{
> public Point (int x, int y)
> {
> Console.WriteLine( "[{0}] {1}",
> System.AppDomain.CurrentDomain.FriendlyName,
> "Point constructor");
> this.x = x;
> this.y = y;
> }
> public int X
> {
> get
> {
> Console.WriteLine( "[{0}] {1}",
>System.AppDomain.CurrentDomain.FriendlyName,
>"Point x.get");
> return this.x;
> }
> set
> {
> Console.WriteLine( "[{0}] {1}",
>System.AppDomain.CurrentDomain.FriendlyName,
>"Point x.set");
> this.x = value;
> }
> }
> public int Y
> {
> get
> {
> Console.WriteLine( "[{0}] {1}",
>System.AppDomain.CurrentDomain.FriendlyName,
>"Point y.get");
> return this.y;
> }
> set
> {
> Console.WriteLine( "[{0}] {1}",
>System.AppDomain.CurrentDomain.FriendlyName,
>"Point y.set");
> this.y = value;
> }
> }
>
>
>private int x;
>private int y;
> }
> // the shape class marshals by reference
> public class Shape : MarshalByRefObject
> {
>public Shape(int upperLeftX, int upperLeftY)
>{
> Console.WriteLine( "[{0}] {1}",
> System.AppDomain.CurrentDomain.FriendlyName,
> "Shape constructor");
> upperLeft = new Point(upperLeftX, upperLeftY);
>}
>public Point GetUpperLeft( )
>{
> return upperLeft;
>}
>public void ShowUpperLeft( )
>{
> Console.WriteLine( "[{0}] Upper left: {1},{2}",
> System.AppDomain.CurrentDomain.FriendlyName,
> upperLeft.X, upperLeft.Y);
>}
>private Point upperLeft;
> }
> public class Tester
> {
>public static void Main( )
>{
> Console.WriteLine( "[{0}] {1}",
> System.AppDomain.CurrentDomain.FriendlyName,
> "Entered Main");
> // create the new app domain
> AppDomain ad2 =
> AppDomain.CreateDomain("Shape Domain");
> // Assembly a = Assembly.LoadFrom("ProgCSharp.exe");
> // Object theShape = a.CreateInstance("Shape");
> // instantiate a Shape object
> ObjectHandle oh = ad2.CreateInstance(
> "ProgCSharp",
> "ProgCSharp.Shape", false,
> System.Reflection.BindingFlags.CreateInstance,
> null, new object[] {3, 5},
> null, null, null );
> Shape s1 = (Shape) oh.Unwrap( );
> s1.ShowUpperLeft( ); // ask the object to display
> // get a local copy? proxy?
> Point localPoint = s1.GetUpperLeft( );
> // assign new values
> localPoint.X = 500;
> localPoint.Y = 600;
> // display the value of the local Point object
> Console.WriteLine( "[{0}] localPoint: {1}, {2}",
>System.AppDomain.CurrentDomain.FriendlyName,
>localPoint.X, localPoint.Y);
> s1.ShowUpperLeft( ); // show the value once more
> }
>}
> }
>
>
>
> Here is the output:
>
> [EMAIL PROTECTED]:~$ mono ProgCSharp.exe
> [ProgCSharp.exe] Entered Main
>
> Unhandled Exception: System.MissingMethodException: Constructor not found.
>
> Server stack trace:
> in <0x0019a> System.Activator:CreateInstance
> (System.Type,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo,object[])
> in <0x00074> System.Activator:CreateInstance
> (string,string,bool,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo,object[],System.Security.Policy.Evidence)
> in <0x00055> System.AppDomain:CreateInstance
> (string,string,bool,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo,object[],System.Security.Policy.Evidence)
> in (unmanaged) (wrapper managed-to-native)
> System.Runtime.Remoting.RemotingServices:InternalExecute
> (System
[Mono-list] Instantiating an object via AppDomain.CreateInstance
Hello all,
If I instantiate an object via AppDomain.CreateInstance , and this object's
class has a constructor with parameters, I get the exception
Unhandled Exception: System.MissingMethodException: Constructor not found.
though needed parameters are passed to AppDomain.CreateInstance
I found it out trying an example from Programming C#, 2nd edition. This example
runs on MS .NET and fails on Mono.
Here is it :
using System;
using System.Runtime.Remoting;
using System.Reflection;
namespace ProgCSharp
{
// for marshal by reference comment out
// the attribute and uncomment the base class
[Serializable]
public class Point // : MarshalByRefObject
{
public Point (int x, int y)
{
Console.WriteLine( "[{0}] {1}",
System.AppDomain.CurrentDomain.FriendlyName,
"Point constructor");
this.x = x;
this.y = y;
}
public int X
{
get
{
Console.WriteLine( "[{0}] {1}",
System.AppDomain.CurrentDomain.FriendlyName,
"Point x.get");
return this.x;
}
set
{
Console.WriteLine( "[{0}] {1}",
System.AppDomain.CurrentDomain.FriendlyName,
"Point x.set");
this.x = value;
}
}
public int Y
{
get
{
Console.WriteLine( "[{0}] {1}",
System.AppDomain.CurrentDomain.FriendlyName,
"Point y.get");
return this.y;
}
set
{
Console.WriteLine( "[{0}] {1}",
System.AppDomain.CurrentDomain.FriendlyName,
"Point y.set");
this.y = value;
}
}
private int x;
private int y;
}
// the shape class marshals by reference
public class Shape : MarshalByRefObject
{
public Shape(int upperLeftX, int upperLeftY)
{
Console.WriteLine( "[{0}] {1}",
System.AppDomain.CurrentDomain.FriendlyName,
"Shape constructor");
upperLeft = new Point(upperLeftX, upperLeftY);
}
public Point GetUpperLeft( )
{
return upperLeft;
}
public void ShowUpperLeft( )
{
Console.WriteLine( "[{0}] Upper left: {1},{2}",
System.AppDomain.CurrentDomain.FriendlyName,
upperLeft.X, upperLeft.Y);
}
private Point upperLeft;
}
public class Tester
{
public static void Main( )
{
Console.WriteLine( "[{0}] {1}",
System.AppDomain.CurrentDomain.FriendlyName,
"Entered Main");
// create the new app domain
AppDomain ad2 =
AppDomain.CreateDomain("Shape Domain");
// Assembly a = Assembly.LoadFrom("ProgCSharp.exe");
// Object theShape = a.CreateInstance("Shape");
// instantiate a Shape object
ObjectHandle oh = ad2.CreateInstance(
"ProgCSharp",
"ProgCSharp.Shape", false,
System.Reflection.BindingFlags.CreateInstance,
null, new object[] {3, 5},
null, null, null );
Shape s1 = (Shape) oh.Unwrap( );
s1.ShowUpperLeft( ); // ask the object to display
// get a local copy? proxy?
Point localPoint = s1.GetUpperLeft( );
// assign new values
localPoint.X = 500;
localPoint.Y = 600;
// display the value of the local Point object
Console.WriteLine( "[{0}] localPoint: {1}, {2}",
System.AppDomain.CurrentDomain.FriendlyName,
localPoint.X, localPoint.Y);
s1.ShowUpperLeft( ); // show the value once more
}
}
}
Here is the output:
[EMAIL PROTECTED]:~$ mono ProgCSharp.exe
[ProgCSharp.exe] Entered Main
Unhandled Exception: System.MissingMethodException: Constructor not found.
Server stack trace:
in <0x0019a> System.Activator:CreateInstance
(System.Type,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo,object[])
in <0x00074> System.Activator:CreateInstance
(string,string,bool,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo,object[],System.Security.Policy.Evidence)
in <0x00055> System.AppDomain:CreateInstance
(string,string,bool,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo,object[],System.Security.Policy.Evidence)
in (unmanaged) (wrapper managed-to-native)
System.Runtime.Remoting.RemotingServices:InternalExecute
(System.Reflection.MonoMethod,object,object[],object[]&)
in <0x4> (wrapper managed-to-native)
System.Runtime.Remoting.RemotingServices:InternalExecute
(System.Reflection.MonoMethod,object,object[],object[]&)
in <0x00172> System.Runtime.Remoting.RemotingServices:InternalExecuteMessage
(System.MarshalByRefObject,System.Runtime.Remoting.Messaging.IMethodCallMessage)
Exception rethrown at [0]:
in <0x00748> System.Runtime.Remoting.Pr
